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Autopa ... 5/31/2019

2013 Chevrolet Express 2500 LT 8 Cyl 6.00L


How do I diagnose P2008 OBD-II Trouble Code of Intake Manifold Runner Control Circuit Open Bank 1 of a car?

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PartsAvatar Ca

PartsAvatar Ca 5/31/2019

What the P2008 code means?

P2008 means that the intake manifold runner route has an open electrical link bank 1. The ECU tries to control the angle of the intake manifold runner flappers and when it cannot control this circuit sets a Check Engine Light.

What causes the P2008 code?

• The MAF sensor or the EGR have the ability to set this code if they fail, however, they will set a code of their own to coincide with the P2008 code. In this case they would be diagnosed and repaired first and the codes erased

• The intake manifold runner control solenoid

• The swirl flaps are contaminated

• Broken vacuum lines

• Poor electrical connection

• Open or short in the wiring harness

What are the symptoms of the P2008 code?

Symptoms may include a rough engine idle, an engine surge, a slight reduction in low end engine torque, a code will be stored and a service engine soon lamp may be illuminated. Since this is considered a "soft code" the service engine soon lamp may flash until multiple failure cycles are accomplished. If the system corrects the conditions for setting the code, the PCM will reset the malfunction indicator lamp. Hard codes will remain until the conditions are rectified.

Common mistakes when diagnosing the P2008 code?

Two common causes of this code being stored come to mind from personal experience. The primary is due to a faulty intake manifold runner manage solenoid. The vacuum control solenoid is prepared with an engine vacuum filter that often become clogged and allows debris to enter the solenoid and supply to failure. The next cause is due to carbon deposit which forms on the manifold runner flaps. The carbon deposits make it impossible for the flaps to open and/or close properly. If there are mass airflow codes or barometric pressure sensor codes present, then either one of those sensors could have contributed to this code being stored as well. Broken or disconnected vacuum lines.

What repairs can fix the P2008 code?

• Intake manifold runner flaps unstuck

• Wiring harness replaced or repaired as needed

• Intake manifold runner control solenoid replacement

• Repair of poor electrical connection


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